Reaction of peas (Pisum sativum L.) to sodium substitution for potassium

Tisma, A.; Kastori, R.; Stankovic, Z.

Reaction of peas (Pisum sativum L.) to sodium substitution for potassium

1988

Tisma, A. (Poljoprivredni fakultet, Novi Sad (Yugoslavia)) | Kastori, R. | Stankovic, Z.

Reaction of two pea varieties to sodium substitution for potassium was examined in controlled conditions. The following conclusions were drawn. The results of cyclic and non-cyclic phosphorylation readings indicated that sodium may have a certain effect on both photophosphorylation and P/O quotient. The substitution of sodium for potassium affected the intensity of respiration. The intensity tended to increase with the amount of sodium. The largest dry matter mass was found in the variants in which 20% of potassium were substituted with sodium. It ensues that sodium stimulates the accumulation of dry matter in peas even in conditions of sufficient provision with potassium. The substitution affected the accumulation of potassium, sodium, calcium, magnesium, and phosphorus. The accumulation was more or less specific, depending on physical and chemical properties and physiological role of certain ions. The examined varieties exhibited a similar reaction to the sodium substitution for potassium.

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